JPS6226181A - Motorcycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motorcycle in which a front wheel is supported via a swing arm.

2. Description of the Related Art A typical motorcycle includes a frame configured by connecting various members such as a head vibrator, a main vibrator, and a down tube. This frame steers the front and rear wheels,
It is the core structure of a vehicle that is connected via a suspension mechanism, and receives reaction forces from the front and rear wheels.
It has the role of holding equipment such as engines and power transmission devices.

Therefore, this frame is sturdy and weighs quite a lot.

By the way, a motorcycle without a frame as described above has been proposed in Japanese Patent Publication No. 58-49435. In this motorcycle, upper and lower arms (swing arms) are attached to a connecting plate that is integrally fixed to the motor (engine) so that they can rotate freely in a vertical plane, and the front wheel is supported at the tips of these arms. has been done. Similarly, the rear wheel is swingably supported via a fork member by a connecting plate fixed to the engine. Therefore, in this motorcycle, the engine constitutes the frame of the vehicle, and this engine constitutes a means for transmitting static and dynamic forces between the front and rear parts of the vehicle. Since traditional frame structures such as these are no longer used, the weight of both wheels is reduced and the center of gravity of the vehicle is lowered.

(Shiyo and 20) In a motorcycle with a normal frame structure, the front wheel is connected to the head pipe of the frame via the front fork, and the handlebar is connected to this head vibe, so the brake installed on the handlebar is The brake hose that connects the lever and the front wheel brake can be placed along and supported by the front fork, head pipe, and handlebar, but it is also possible to support the front wheel via the swing arm as described above. In a two-wheeled motor vehicle, the handlebar and the front wheel are not directly connected by a suspension device such as a front fork, making the arrangement and support of the brake hose complicated.

■ -° And for this reason, in the present invention, in a motorcycle in which the front wheel is supported by a swing arm that is pivotally supported in the center of the vehicle body and extends forward, the brake hose connected to the front wheel brake is connected to the front wheel. It is inserted into and supported by the swing arm.

According to the present invention, it is possible to reliably and easily support the brake hose without causing it to sag and sway, and the appearance is also good.

Tip - Shi Ichi defeat The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 is a side view of the entire motorcycle according to the present invention.

First, the outline of the structure of this motorcycle will be explained with reference to FIG. This motorcycle has an engine unit of 3. front wheel 4
The vehicle body structure 1 includes a rear wheel 5, and an upper structure 2 mounted on the vehicle body structure 1. The rear ends of two upper and lower swing arms, namely an upper swing arm 6 and a lower swing arm 7, are attached to the front part of the engine unit 3 so as to be able to pivot in the vertical direction. , front wheel 4 axle 8
The arm member 9 is attached to both ends of the arm member 9 via ball joints 10 and 11, respectively. The arm member 9 is also connected to a steering wheel 12 via a steering mechanism such as a knuckle arm (not shown) in the same way as the middle wheel of a normal automobile.By operating the steering wheel 12, the front wheel 4 is moved to a ball joint 10. Steering is performed by rotating around the line connecting 11. Since the swing arm 6.7 forms a parallel link, the angle of inclination of the steering axis is always kept constant. As shown in FIG. 2, the swing arm 6.7 extends along one side of the vehicle body, is curved toward the vehicle center line at its front end, and supports the front wheel 4 in a cantilevered manner on the vehicle center line. ing.

A brake disc 13 is fixedly attached to the side surface of the front wheel 4 on the swing arm side.
Brake calipers 14.14 are provided. 1
Reference numeral 5 denotes a cushion device that cushions the vertical movement of the front wheel 4. Its upper end is fixed to the engine unit 3 side, and its lower end is connected to the lower swing arm 7 via a link mechanism 16.

The rear wheel 5 is pivotably supported on the engine unit 3 or attached to the engine unit 3 via a rear fork 17, and a rear cushion device 18 similar to the cushion device 15 is connected between the engine unit 3 and the rear fork 17. is set between.

The upper structure part 2 has a bracket member 1 attached to the engine unit 3.
9, etc., and the aforementioned handle 12 is rotatably provided on this upper structure portion 2. Since this upper structure part 2 does not have body frame components such as a head pipe and a main vibrator as in conventional motorcycles, the front part thereof serves as a storage compartment 20, which can store, for example, a helmet 21, etc. It has become. A carburetor 22 and an air cleaner 23 are arranged behind the storage compartment 20 so that the engine intake air is taken in from above downward, and a fuel tank 24 is arranged behind the cylinders of the engine and above the transmission case. There is support on top. This fuel tank arrangement makes it possible to mount a large fuel tank and is effective in lowering the center of gravity of the vehicle. 25 is a fuel inlet, and 26 is a seat.

FIG. 2 shows the front part of the engine unit 3 of the motorcycle,
7 is a plan view showing the swing arm 6.7 and the front wheel 4 in more detail; FIG. The engine shown is a 4-cylinder in-line type.
This is a horizontally mounted engine with the crankshaft aligned across the width of the vehicle. The engine unit 3 has a cylinder 27. It consists of three parts: a crankcase 28 and a transmission case 29.

The left and right sides of the crankcase 28 are covered with a left crankcase side cover 30 and a right crankcase side cover 31, respectively. These side covers30.
31 are attached to the sides of the crankcase 28 with bolts 32, as in a normal engine, but as shown in FIG. 1, upper and lower arm pieces 33 and 34 extend forward.
It is equipped with The rear end of the upper swing arm 6 is pivotally connected to a pivot shaft that includes the upper arm piece 33 of the bar 30.31, and similarly the lower arm piece 3
The rear end portion of the lower swing arm 7 is pivotally connected to a pivot shaft passing through the lower swing arm 4. Therefore, there is no need to fix a bracket for attaching the swing arm to the engine unit 3, and the attachment position of the swing arm can be easily changed by simply changing the shape of the crankcase side cover 30, 31.

The main body portion of the upper swing arm 6 extends linearly forward from the pivot joint provided on the left side of the engine unit 3, and the front end portion 6a is curved toward the center of gravity IQc, and the ball joint 10 and the front end portion 6a are curved toward the center of gravity IQc. The front wheel 4 is supported in a cantilever manner along the center line C of the heavy body via the arm member 9.

The rear end portion of the upper swing arm 6 is bifurcated toward the rear, and one branch portion 6b extends forward in a curved manner from the pivot portion on the left side of the engine unit and constitutes a part of the main body portion. ing. The other branch 6C branches from the main body, crosses behind the front wheels 4 in the widthwise direction, reaches the right side of the vehicle body, bends further rearward, and is pivoted to the right side of the engine unit 3. That is, the upper swing arm 6 has an H-shaped planar shape arranged in the front-rear direction, and has both branch portions 6b.
, 6c on both sides of the engine unit 3 at wide mounting R]. And the engine unit]
The engine unit 3 and the branch part 6b are located in front of the engine unit 3 and the branch part 6b.

An opening 35 surrounded by 6C is formed.

The lower swing arm 7 is also the upper swing arm 6 explained above.
The exhaust pipe 38 and the cushion device 15 are arranged inside a similar opening formed by the opening 35 and the lower swing arm 7.

The front wheel 4 has its left side surface, that is, the swing arm 6.
A brake disc 13 is fixed to the side supported by 7 and rotates together with the front wheel 4. Two brake calipers 14 straddle this brake disc 13 .
14 is provided, and as is well known, by supplying hydraulic pressure, its friction pads clamp the brake disc 13 and brake the front wheel 4. Therefore, brake caliper 1
4 is attached to the vehicle body side, for example, to an arm member 9.

The above hydraulic pressure is applied to the brake caliper 1 by operating the brake lever 37 provided on the handle 12 (Fig. 1).
4. The brake lever 37 is pivotally connected to a mask cylinder 38 fixed to the handle 12, and when the brake lever 31 is operated, hydraulic pressure is generated in the mask cylinder 38, and this hydraulic pressure is transmitted to the brake caliper 14 through the brake hose 39. Supplied. In a normal motorcycle with a heavy frame, this brake hose is arranged and supported along the front fork and helad pipe that connect the collar and the body frame.
Since there is no such support member in this motorcycle table, the brake hose is connected to the upper structure part 2 and the brake caliper 1.
It is in a state where it is freely suspended in the space between 4 and 4. Therefore, in this embodiment, the brake hose 39 is disposed and supported from the mask cylinder 38 through the inside of the upper structure 2, along the front surface of the bracket member 19 and the cylinder 27, and is connected to the rear end of the upper swing arm 6. It is guidance. The upper swing arm 6 has a box-like or groove-like cross-sectional shape, and has a hole 40 in the inner side wall in the middle and small direction at the rear end, as shown in FIG.
The brake hose 39 is guided into the interior of the upper swing arm 6 through this hole 40 toward the interior of the vehicle, and is inserted and supported by the upper swing arm 6 to reach its tip. . A grommet 41 is inserted between the hole 40 and the brake hose 39 to prevent the brake hose 39 from moving or getting stuck. Since the hose 39 passes through the side wall of the arm at a point with a small amount of movement, no large bending is applied to the hose 39 when the arm swings.Furthermore, since the hose 39 passes through the hole 40 in the direction of the interior of the vehicle as described above, It is possible to prevent the grommet 41 and the hose 39 from coming undone when the arm swings.The brake hose 39 branches into two at its tip, passes through the hole in which the grommet is attached, and connects the upper swing arm 6. Go outside,
Each is connected to each brake caliper 14. The tip of the brake hose 39 is connected to the upper swing arm 6.
The brake caliper 14 may be branched into two after exiting to the outside, and only one brake caliper 1f1Ml may be provided.

As described above, in the present invention, in a motorcycle in which the front wheel is supported by a swing arm that is swingably supported in the center of the vehicle body and extends forward, the brake hose connected to the front wheel brake is connected to the swing arm. Since it is inserted through the arm and supported, the brake hose can be supported reliably and easily even on motorcycles that do not have a normal body frame, and the brake hose is hidden by the swing arm, so it has a good appearance. It is.

[Brief explanation of drawings]

FIG. 1 is an overall side view of a motorcycle according to the present invention, FIG. 2 is a plan view showing the front part of the engine unit, swing arm, and front wheel of the motorcycle/car in more detail.
The figure is a partially enlarged sectional view of FIG. 2. DESCRIPTION OF SYMBOLS 1... Vehicle body structure part, 2... Upper drawing part, 3... Engine unit, 4... Front wheel, 5... Rear wheel, 6...
・Upper swing arm, 7...Lower swing arm, 8・
... Axle, 9... Arm member, 10.11... Bolge 3 India, 12... Handle, 13... Brake disc, 14... Brake caliper, 15...
Cushion device, 16... Link mechanism, 17... Rear hawk, 18... Rear cushion device, 19...
Bracket member, 20... Container, 21... Helmet, 22... Carburetor, 23... Air cleaner, 24... Fuel tank, 25... Fuel inlet, 26
...Seat, 27...Cylinder, 28...Crankcase, 29...Mission case, 30...Left crankcase side cover, 31...Right crankcase side cover, 32...Bolt , 33... Arm piece, 34... Arm piece, 35... Opening, 36...
Exhaust pipe, 37... Brake lever, 38 River mask cylinder, 39... Brake hose, 40... Hole, 41
...Grommet.

Claims (1)

[Claims] What is claimed is: 1. A motorcycle in which a front wheel is supported by a swing arm extending forward from a central portion of the vehicle body, characterized in that a brake hose connected to a front wheel brake is inserted through and supported by the swing arm.